Last updated: August 21, 2025
In March, Iwakuni, Japan, begins to shed the chill of winter, welcoming the arrival of spring. The maximum temperature reaches a pleasant 22°C (71°F), while the average hovers around 10°C (50°F), presenting a comfortable climate for outdoor activities. Nighttime brings a cooler minimum of 1°C (33°F), reminding residents of the lingering winter chill. However, March also sees a fair amount of moisture, with 125 mm (4.9 in) of precipitation over approximately 10 days, contributing to the lush scenery typical of this season. The humidity level at 69% enhances the fresh, invigorating feel of the air, making this month a beautiful time to enjoy Iwakuni's natural splendor.
As winter fades, March ushers in a refreshing change in Iwakuni, Japan, with temperatures marking a significant transition. The minimum rises to a mild 1°C (33°F), while the average temperature reaches 10°C (50°F), offering a glimpse of the warmth to come. On sunny days, highs can even climb to a pleasant 22°C (71°F), reflecting the onset of spring. This shift not only invigorates the landscape but also invites outdoor activities, as residents and visitors alike embrace the emerging cherry blossoms and vibrant greenery. The increase in temperatures from the chill of winter to the renewal of spring is a delightful reminder of nature’s cycles.
In March, Iwakuni experiences a significant surge in precipitation, with a total of 125 mm (4.9 in) over 10 days of rainfall. This increase marks a notable transition from the winter months, where January and February saw 49 mm and 69 mm, respectively. As the city welcomes spring, the rainfall not only nourishes the blossoming flora but also sets the stage for even wetter months ahead, as April and May continue the trend with 137 mm and 136 mm. This progressive rise in both precipitation amount and the number of rainy days highlights the shift towards Iwakuni's lush and vibrant season.
In March, Iwakuni, Japan, experiences a noticeable dip in humidity, with levels at 69%, marking a transition from the wetter winter months. This decline reflects a gradual shift as the region approaches the increasingly humid spring, where humidity begins to rise again in April to 75%. As the days grow warmer, May brings a significant spike to 84%, setting the stage for the summer months when humidity peaks dramatically, reaching a sweltering 95% in July. Overall, March serves as a brief respite before the onset of the more humid and sticky conditions that characterize the later months of the year.
In March, Iwakuni begins to transition into spring, bringing a notable increase in UV intensity with an UV Index of 8, categorizing exposure as very high. This means residents and visitors should be cautious, as the burn time is reduced to just 15 minutes. This shift marks a significant jump from the previous months, where the UV Index hovered between 4 and 5. As the days grow longer and the sun becomes stricter, it's essential to stay informed on changing UV conditions throughout the upcoming months. For more in-depth insights and to stay protected, visit Iwakuni UV Index.
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As winter gives way to spring, March in Iwakuni, Japan, shines with an impressive 266 hours of sunshine, marking a notable increase from the 227 hours experienced in February. This upward trend in daylight is part of a broader seasonal shift, with each subsequent month leading into summer showcasing even more radiant days. April follows closely with 282 hours, and May dazzles with 303 hours, illustrating a consistent rise that peaks with August's stunning 308 hours. This gradual build toward summer not only brightens the landscape but also invigorates the spirit, inviting both locals and visitors to embrace the warmth of Iwakuni's spring sunshine.
In March, Iwakuni experiences a 40% chance of sunny weather, marking a slight dip from the preceding months of January and February, which boast sunny probabilities of 43% and 50%, respectively. As spring begins to emerge, the likelihood of sunshine begins to vary more significantly in the subsequent months, with April's chance increasing to 47%, before dropping sharply to its lowest in the summer months of June and July, at just 25% each. Observing this trend, March stands as a transitional month, hinting at the hopeful arrival of sunnier days ahead while still holding onto some of winter's cloudier characteristics.
As March graces Iwakuni, Japan, daylight begins to stretch, offering 11 hours of sunlight—a subtle yet significant increase from the consistent 10 hours seen in the preceding months. This shift signals the impending warmth of spring, setting the stage for even longer days ahead, as daylight dramatically expands to 13 hours in April and May. The gradual ascent in daylight not only enhances outdoor activities but also lifts spirits, heralding the arrival of vibrant blooms and longer evenings. With each passing month, Iwakuni transitions towards the sun-drenched days of summer, where July and June boast an impressive 14 hours of daylight, before gradually tapering off in the autumn months.
In Iwakuni, Japan, the March winds offer a gentle reprieve from the harsher winter gusts, with an average speed of 2.8 m/s (6 mph), identical to that of April and May. This slight drop from February's 3.3 m/s signals the transition into spring, where the breezes become milder as the region welcomes warmer weather. As we move into the summer months, wind speeds remain relatively low, dipping to their annual low of 1.8 m/s in June, before gradually rising again in late summer and autumn. Overall, March stands as a charming time where the winds are soft, marking the arrival of blooming flora and inviting outdoor explorations.
Weather in Iwakuni varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Iwakuni, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between March and January, we see notable differences in temperature and precipitation. March experiences a milder temperature range with minimums around 1°C (33°F) and averages reaching 10°C (50°F), while January is considerably colder, featuring minimums of -4°C (25°F) and an average of 5°C (42°F). Precipitation is also more frequent in March, with about 125 mm (4.9 in) over 10 days, compared to January's 49 mm (1.9 in) spread over just 6 days. Additionally, humidity is slightly lower in March at 69%, compared to January's higher level of 76%. For a more detailed look at January weather, visit Iwakuni weather in January.
In comparing the weather of March and February, March brings a noticeable increase in temperature, with an average of 10°C (50°F) compared to February's 6°C (43°F). The minimum temperature in March is a mild 1°C (33°F), while February dips to a chilly -4°C (26°F). Additionally, March sees a slightly higher precipitation level at 125 mm (4.9 in) over 10 days, versus February's 69 mm (2.7 in) over 7 days. Despite March being wetter, both months maintain a similar humidity level, with February at 72% and March at 69%. For a more detailed look at February's weather, you can visit Iwakuni weather in February.
In comparing the weather patterns of March and April, we observe a gradual warming trend. March typically sees minimum temperatures around 1°C (33°F), with an average of 10°C (50°F) and a maximum reaching up to 22°C (71°F). In contrast, April experiences slightly higher temperatures, with a minimum of 2°C (36°F), an average of 14°C (58°F), and a maximum of 24°C (76°F).
While both months receive significant rainfall, April records a slightly higher total precipitation at 137 mm (5.4 in) over 9 days, compared to March's 125 mm (4.9 in) over 10 days. Additionally, humidity levels increase from March to April, rising from 69% to 75%. For more detailed information, you can check Iwakuni weather in April.
March and May present contrasting weather patterns as the seasons transition from winter to spring. In March, temperatures range from a chilly minimum of 1°C (33°F) to a comfortable maximum of 22°C (71°F), with an average of 10°C (50°F). The month is relatively wet, with about 125 mm (4.9 in) of precipitation spread over 10 days and a humidity level of 69%. By May, the weather warms significantly, featuring a minimum temperature of 7°C (45°F) and reaching up to 28°C (83°F), with an average of 19°C (66°F). While precipitation slightly increases to 136 mm (5.4 in) across 9 days, humidity rises to 84%, adding to the feeling of warmth and mugginess. For more details on the weather during this time, check out Iwakuni weather in May.
March and June present starkly different weather patterns. In March, temperatures typically range from a chilly minimum of 1°C (33°F) to a comfortable maximum of 22°C (71°F), with an average of 10°C (50°F). This month also experiences considerable precipitation, totaling about 125 mm (4.9 in) over approximately 10 days, accompanied by a humidity level of 69%. In contrast, June brings warmer temperatures, with minimums around 14°C (57°F) and maximums reaching 29°C (85°F), and an average temperature of 22°C (72°F). Rainfall increases to 181 mm (7.1 in) spread over 14 days, coupled with a higher humidity level of 88%. For more detailed insights, you can check Iwakuni weather in June.
March and July present notably contrasting weather conditions. In March, temperatures range from a chilly minimum of 1°C (33°F) to a pleasant maximum of 22°C (71°F), with an average of 10°C (50°F). The month is characterized by moderate precipitation totaling 125 mm (4.9 in) over about 10 days and a relatively mild humidity level of 69%. In contrast, July experiences much warmer weather, with temperatures soaring from a minimum of 18°C (65°F) to a sweltering maximum of 35°C (95°F), averaging around 26°C (79°F). Rainfall is significantly higher in July, reaching 386 mm (15.2 in) spread across 19 days, alongside markedly increased humidity at 95%. For further details, check out the link: Iwakuni weather in July.
In March, the weather experiences milder temperatures, with a minimum of 1°C (33°F) and an average of 10°C (50°F), peaking at 22°C (71°F). This month also sees significant precipitation, totaling 125 mm (4.9 in) over about 10 days, while humidity levels hover around 69%. By contrast, August brings much warmer conditions, with temperatures ranging from a minimum of 20°C (67°F) to an average of 28°C (82°F) and soaring to 35°C (96°F) at times. Precipitation increases considerably to 256 mm (10.1 in) over 14 days, accompanied by higher humidity levels at 93%. For more details about August weather specifically, you can check Iwakuni weather in August.
In March, temperatures in Iwakuni range from a chilly 1°C (33°F) to a mild 22°C (71°F), with an average of 10°C (50°F). The month sees approximately 125 mm (4.9 in) of precipitation, spread over about 10 days, and a humidity level of 69%. In contrast, September boasts significantly warmer temperatures, with a minimum of 15°C (60°F) and a maximum of 33°C (92°F), averaging around 24°C (75°F). However, this month also brings more rainfall, totaling 237 mm (9.3 in) over approximately 14 days and higher humidity at 84%. For more specifics about September's climate, you can check Iwakuni weather in September.
March and October present contrasting weather conditions. In March, temperatures range from a chilly minimum of 1°C (33°F) to a comfortable maximum of 22°C (71°F), with an average temperature of 10°C (50°F). The month sees about 125 mm (4.9 in) of precipitation over 10 days, accompanied by a humidity level of 69%. In contrast, October enjoys warmer temperatures, starting at a minimum of 8°C (46°F) and peaking at 29°C (85°F), with an average of 19°C (66°F). However, October experiences higher precipitation at 172 mm (6.8 in), also spread over 10 days, and a higher humidity level of 79%. For a more detailed look at October weather patterns, check out Iwakuni weather in October.
March and November exhibit distinct weather characteristics, with March beginning to usher in the warmth of spring. In March, temperatures range from a chilly minimum of 1°C (33°F) to an average of 10°C (50°F) and can peak at 22°C (71°F). This month also sees substantial rainfall, with about 125 mm (4.9 in) over 10 days, contributing to a humidity level of 69%.
Conversely, November offers slightly warmer temperatures, with lows around 2°C (36°F), an average of 13°C (55°F), and a maximum temperature reaching 23°C (74°F). Precipitation decreases significantly to 37 mm (1.5 in) over only 5 days, although humidity remains higher at 76%. For more detailed information, you can visit Iwakuni weather in November.
March and December exhibit notable contrasts in weather conditions. In March, temperatures range from a minimum of 1°C (33°F) to a maximum of 22°C (71°F), with an average temperature of 10°C (50°F). This month also sees higher precipitation, totaling around 125 mm (4.9 in) over about 10 days, accompanied by a humidity level of 69%. In contrast, December features cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 20°C (69°F), resulting in an average of 7°C (46°F). The overall precipitation decreases to 61 mm (2.4 in), spread over just 6 days, and the humidity rises slightly to 75%. For more specific details on December weather, you can check Iwakuni weather in December.
As March ushers in the arrival of spring, Iwakuni’s weather transforms, offering a refreshing change from the winter chill. Average temperatures climb, with daily highs reaching a pleasant 22°C (71°F), inviting residents and visitors alike to enjoy the blossoming landscape. However, with an average humidity of 69% and about ten days of rainfall accumulating to 125 mm, this month can still feel quite damp. Compared to the colder, drier months that precede it, March stands out as a time of transition, where the potential for sunshine competes with inevitable showers. To explore more about the yearly climate patterns, check out Iwakuni Climate.